/**
 *    Copyright (C) 2018-present MongoDB, Inc.
 *
 *    This program is free software: you can redistribute it and/or modify
 *    it under the terms of the Server Side Public License, version 1,
 *    as published by MongoDB, Inc.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    Server Side Public License for more details.
 *
 *    You should have received a copy of the Server Side Public License
 *    along with this program. If not, see
 *    <http://www.mongodb.com/licensing/server-side-public-license>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the Server Side Public License in all respects for
 *    all of the code used other than as permitted herein. If you modify file(s)
 *    with this exception, you may extend this exception to your version of the
 *    file(s), but you are not obligated to do so. If you do not wish to do so,
 *    delete this exception statement from your version. If you delete this
 *    exception statement from all source files in the program, then also delete
 *    it in the license file.
 */

#pragma once

#include "mongo/db/matcher/expression.h"
#include "mongo/db/matcher/expression_text_base.h"
#include "mongo/db/matcher/expression_where_base.h"
#include "mongo/db/matcher/extensions_callback.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/pipeline/expression_context.h"
#include "mongo/util/modules.h"

#include <memory>

#include <boost/smart_ptr/intrusive_ptr.hpp>

namespace mongo {
class NamespaceString;
class OperationContext;

/**
 * ExtensionsCallbackReal uses the provided OperationContext and namespace to capture context
 * necessary for parsing $text and $where clauses.
 */
class MONGO_MOD_PUB ExtensionsCallbackReal : public ExtensionsCallback {
public:
    /**
     * Does not take ownership of 'nss' or 'opCtx'.
     *
     * 'nss' must outlive this object. 'opCtx' must outlive this object also; in addition, 'opCtx'
     * must outlive any MatchExpression objects generated by these callbacks (as the generated
     * objects are allowed to keep a reference to 'opCtx').
     */
    ExtensionsCallbackReal(OperationContext* opCtx, const NamespaceString* nss);

    ~ExtensionsCallbackReal() override {};

    std::unique_ptr<MatchExpression> createText(
        TextMatchExpressionBase::TextParams text) const final;

    std::unique_ptr<MatchExpression> createWhere(
        const boost::intrusive_ptr<ExpressionContext>& expCtx,
        WhereMatchExpressionBase::WhereParams where) const final;

private:
    OperationContext* const _opCtx;
    const NamespaceString* const _nss;
};

}  // namespace mongo
